We also have two small boys and just bought our first 5er this spring. Our short list was the cougar 336BHS and the Chaparral 360IBL which we purchased....admittedly it doesn't have an outdoor kitchen... we wanted the big living space for rainy days more than the extra kitchen and a dorm fridge in the basement compartment keeps the kiddos from running in and out constantly for drinks. The Chaparral 390 does have a small outdoor kitchen and the big living space.
Best advice I can give is physically get in as many units as you can. I can't tell you how many models we loved in pictures,but hated when we really were in them, and vice versa.
2014 Ram 3500 CCLB 4x4 Dually 68RFE, 370/800 Cummins 3.42 highway gear - Deep Cherry Red
2016 Coachmen Chapparal 360IBL
Sold - 2005 Dodge Ram 2500 SLT QCLB 4x4 - Cummins Power